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United States Patent | 5,091,730 |
Cardiasmenos ,   et al. | February 25, 1992 |
A pulse radar for operation at 94 GHz and higher frequencies is shown to include an antenna, a diplexer and first detector that are each optically fed so that radio frequency signals may be, when transmitting, passed through the diplexer to the antenna and, when receiving, from the antenna through the diplexer to the first detector.
Inventors: | Cardiasmenos; Apostle G. (Acton, MA); Blustine; Martin R. (Waltham, MA) |
Assignee: | Raytheon Company (Lexington, MA) |
Appl. No.: | 666829 |
Filed: | March 8, 1991 |
Current U.S. Class: | 342/153; 244/3.16; 342/53; 342/62; 455/330 |
Intern'l Class: | G01S 013/44; G01S 007/285; F41G 007/22; H01L 027/14 |
Field of Search: | 342/62,149,153,53 455/327,330 343/720,721 244/3.16,3.19 250/338.1,338.4,345 |
3746454 | Jul., 1973 | Pace et al. | 342/179. |
4276655 | Jun., 1981 | Kraemer et al. | 455/327. |
4461039 | Jul., 1984 | Herman | 455/330. |
4491977 | Jan., 1985 | Paul | 455/330. |
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